The main takeaway is that it’s fun to see typically buttoned-up people like Sheryl Sandberg talking about real issues in a unique way — and, of course, it’s another feather in the cap for RapGenius’ always quotable founding team.

Yes, it’s a silly celebrity app, but it’s also actually slick, addictive, fun, free to download on Android and iOS, with revenue-generation-tool-of-the-moment “stickers” available for purchase. So basically, all the other mobile app CEOs out there should watch their backs.

Individually each of these two things are small news items. But they’re just the latest examples of technology and hip-hop coming together — and that’s proving to be a marriage that seems to produce some of the most interesting stories around.